Overview of Quality based Water Supply:
Quality based water supply is a deep treatment of tap water, which uses methods such as filtration, softening, membrane separation (RO or UF) sterilization to remove harmful heavy metals, organic matter, bacteria, viruses, and other impurities from the water, making it high-quality drinking water (or purified water). It is directly delivered to each household through specialized sanitary pipelines for residents to use, completely separated from the original tap water, and the original tap water becomes daily miscellaneous water. This method of dividing two pipelines into different water qualities to supply drinking water and domestic water is called high-quality drinking water through pipelines, also known as differentiated water supply.
The essence of differentiated water supply is to deeply treat the tap water (non potable) that has been preliminarily treated by urban water purification plants, in order to achieve high-quality drinking water that can meet the needs of human health. The core equipment is membrane filtration equipment, such as ultrafiltration equipment and reverse osmosis equipment. It is all based on the filtration effect of the membrane on small water molecule clusters, allowing pure water molecules to pass through, while some harmful large particles such as heavy metals, organic matter, bacteria, etc. are filtered and removed. To purify the produced water for direct drinking, this type of water is also known as direct drinking water, and the equipment is also known as direct drinking water equipment.
　　Composition of quality based water supply system:
The core of the quality based water supply system consists of four parts: high-quality drinking water equipment, variable frequency constant pressure water supply equipment, water supply network, and network water circulation sterilization equipment.
1. High quality drinking water equipment
High quality drinking water equipment is the core device for deep purification treatment of tap water. The water production equipment used in pipeline quality water supply projects usually adopts microfiltration, ultrafiltration, nanofiltration, and reverse osmosis filtration technologies to produce high-quality drinking water. Especially, the nanofiltration membrane can effectively remove harmful substances in the raw water, partially desalinate, remove hardness, and retain some minerals in the raw water in an appropriate amount. It is the best membrane technology for producing high-quality drinking water.
2. Variable frequency constant pressure water supply equipment
In the quality based water supply project, a fully automatic constant pressure variable frequency water supply device is used to directly improve the water supply, which is hygienic, safe, and reliable. Users can drink fresh water at any time, avoiding secondary pollution, and the equipment has small footprint, stable performance, and low energy consumption.
3. Quality based water supply network
The quality based water supply network provides necessary conditions for system debugging and network maintenance. The design of a quality based water supply network is different from that of a regular tap water network. Its core is to ensure smooth water circulation and minimize dead corners in the quality based water supply network. The significance of smooth circulation lies in the fact that unused water in the pipeline network must be able to flow in a timely manner and return to the clean water tank through the pipeline disinfection system, rather than staying in a certain section of the pipeline for a long time, otherwise it is prone to secondary pollution and bacterial growth in the pipeline network.
4. Pipeline water circulation disinfection equipment
The quality of water supply through pipelines must achieve the goal of "drinking water as soon as the faucet is turned on". In addition to meeting the export water quality standards for high-quality drinking water equipment, it is necessary to install a timed circulating disinfection device on the pipeline network to ensure the hygiene and safety of the pipeline water and effectively prevent secondary pollution.
　　Characteristics of differentiated water supply:
1. Sanitation: superior to national drinking water standards. Improve the quality of life for residents. Improve health level. High water quality, good taste, healthy and environmentally friendly, safe and reliable.
2. Freshness: Automatic circulation flow, automatic monitoring of water quality, prevention of secondary pollution, and constant freshness of purified water.
3. Health: Reverse osmosis technology separates all impurities and bacteria in water to ensure drinking water quality.
4. Safety: Completely avoid contamination of water sources and pipelines that may affect drinking water quality.